Automatically-threading shuttle for looms



v Nov.15,1927. 1,649,624

W. I. STIMPSON AUTOMATICALLY THREADING SHUTTLE FOR LOOMS I Filed Nov 20, 1926 4 v11 20 :[w P "I 3 I Q"? if: 1 H 5 Jan ll! hi 8 Illlllljlllm ATfoRA/EY Patented Nov. 15, 1927.

UNITED STATES 1 1,649,624 PATENT OFFICE.

WALLACE I. STIMPSON, OF I-IOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER GOR PORATION, OF HOIPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

AUTOMATICALLY-THREADING SHUTTLE FOR LOQMS.

Application filed November 20, 1926. seen no. mama This invention relates to automatically threading shuttles for looms wherein the shuttle is threaded during the loom operation, and is more particularly directed to means for imparting uniform tension to the thread during weaving and preventing wear of the metal parts by the constant attrition 0t thethread.

The present invention is a further de- 1 relopment of the automatically threading shuttles shown and described in the patents to Edward S. Stimpson, No. 1, lS3A92, dated February 12, 1924, and No. 1,538,224, dated lday 19, 1925, wherein the shuttle is provided with a thread casting device for casting the thread on the occurrence of a loop or overthrow as the shuttle is arrested in the shuttlebox, and while the advantages of,

ployed advantageously with other kinds or diameters of shuttles of the loom threading type. in shuttles of this type, the threading end portion or: the shuttle is usually pro- 2 vided with a threading block having a longitudinally extending thread passage and at the forward end of the thread passage the thread is directed past the metal parts to the side delivery eye.

in weaving with certain characters or kinds of filling, such, for instance, as filling of tine count, silk, rayon, and the like, much ditliculty has been experienced in providing a proper tension suitable to the slippery character 01 the yarn employed, and at the same time prevent attrition or wear of the metal parts over which the filling passes during weaving. Heretot'ore it has beenproposed to provide shuttles with glass or porcelain thread guiding elements in an attempt to prevent wear or cutting of certain metal portions by the thread, but in such cases the glass or porcelain parts havenot been disposed and arranged with due regard to the desired tension effect upon the thread in order to lay it properly in the shed, and in iii-any cases the glass or porcelain parts have been arranged as not to act etfec tively in the protection of the metal parts. 59 One of the important features of the present invention consists in providing a vitreous bridge at the forward end of the thread passage over which the thread passes,and in conjunction therewith a further vitreous niemberbridging the passageway leading to be imparted to, the thread even though it be of fine count, silk, rayon, or the like.

In carrying out the invention, the vitreous bridge, formed either of glazed porcelain, glass or the like, is mounted in the shuttle at the forward end of the thread passage above the lower wall thereof and in the passageway leading to the side delivery eye a vitreous bridging member of like material 1S provided whose yarn-engaging surface is below the upper or yarn engaging surface of the bridge, with the result that the yarn is deflected over the vitreous elements on its way to the side delivery eye, thereby not only protecting the metal parts but also iuri nishing the necessary continuous tension to the thread as it is Withdrawn from the shuttle.

The invention and, new features thereof and novel combination of parts will best be made clear from the following description and the accompanying drawings of one good practical form thereof,

In the drawings: d

Fig. 1 is a plan view with some of the parts broken away, showing the threading end of a shuttle provided with the present invention;

Fig. 2 is an enlarged plan view of the threading block containing the present invention and detached from the shuttle;

Fig. 3 is an underside view of the threading block;

Fig. 4 is an end View of the threading i block containing the present invention look ing from the bobbin chamber;

Fig. 5 is a side elevation of the threading block; and

Fig. 6 is a perspective underside View of the threading block containing the present invention.

In the Stimpson Patent, No. 1,538,224,

hereinhefore mentioned, the threading block is shown and described as formed of cast iron having a rust proof covering and provided in the longitudinally extending thread passage with a thread casting device or scroll tor casting the thread out of the threading block and thread passage on the occurrence of a loop or overthrow. The threading block of the present invention may be similarly formed or may be as described in the Stimpson Patent, No. l, l83,4l92, and certain features of the present invention may be advantageously employed in various types of now. well-known threading blocks or threading eyes.

The shuttle l is provided with the usual bobbin chamber 2 in which the filling carrier 3 maybe detachably supported as is common in auton'iatically threading shuttles, and forward of the bobbin chamber the shuttle is provided with a threading block receiving chamber l, while the front end portion of the shuttle may be provided with a recess 5 forming a leader for the thread during the first pick of theshuttle following replenishment.

Mounted in the threading block receiving chamber 4 is the threading block 6 which as hereinbefore stated may be substantially of the character shown and more fully described in the Stimpson patents. The tlnreading block 6 is provided with a longitiulinally extending thread passage T in which is located the thread castingdevice or scroll 8, thelorward end portion 9 or which extends forwardly towards the end of the longitudinally extending thread passage. As herein shown, the threading block 6 provided with the side wallsflO and 11 and the bottom wall 12, between which the longitudinally extending thread passage is formed, and in the thread passage adjacent the bobbin chamber is the thrcad-castmg device or scroll 8, the rear edge portion i l of whlch extends upwardly,

laterally and forwardly relative to the thread passage, *iththe result that 011 the occurrence of a loop or overthrow the thread will be cast upwardly outot the thread passage to be subsequently rethreaded into the scroll or thread casting device on the following pick 01 the shuttle, as more fully described in the Stimpson patent hereinbe fore mentioned. i l

The scroll 8 may be secured in place by suitable means, and as herein shown its heel portion 1e cxtcndsthroughan o )ening in in the base of one of the side walls of the shuttle and is turned laterally at 15, in whichrespect it is substantially the same as shown and described in theStiinpson Patent, No. 1,538,224, and the threading block may be secured in place in the shuttle by? the parts of the threading block may not be scored or unduly worn by the constant attrition of the thread during weaving, and also to. provideproper tension to the thread as it delivered from the shuttle, thebridge and the tensioning member respectively are formed of vitreous material, such, for instance, as glass or glazed porcelain, with the result that the bridge and tensioning member not only protect the metal parts of the threading block and shuttle from wear by the thread but also impart to the thread the desired uniform tension, a fact which is more particularly observable in weaving with thread of line count, silk or rayon.

iiilore particularly stated, the present invention provides a vitreous bridge 16 at the forward end of the thread passage 7 which is formed with a smooth and hardened thread engaging surface. As more par icularly sl'iown in Fig. 5, the vitreous bridge in has its upper thread engaging surface above the lower wall of the thread passage and preferably in the extended longitudinal axis of the thread casting device, while its forward surface as at 17 extends front- 3 7 wa'rdly beyond the lower wall oi the thread passage.

Various mean may be employed in sccuring the vitreous bridge 16 in the position described, but in the present instance of the invention the side wall 11 of the threading block is provided with a perforation 18, Fig. l, of a size to admit the endwise passage of the vitreous bridge ltl, and the opposite wall of the threading block is provided with a recess 19, which does not extend through the wall, to receive and support the opposite end of the vitreous bridge when the latter has been passed through the opening 18 and, extended into its brirb eforming position. lVhen the threading block is secured in the threading block receiving chamber l, the wood of the shuttle overlies the end 20 oi the bridge and main tains the bridge in operative position.

The threading block of the present inven tion dill'ers somewhat from the threading blocks shown anddescribcd in the Stinlpson patents above mentioned, and in this respect the threading block is provided with a ledge or laterally extending Wall 21 below the apron or thread director Figs. 4, 5 and 6, the forward edge portion of which constitutes the downwardly extending born 23 which assists in directing the thread downwardly to the passage lead as indicated in ing to the side delivery eye during sluittle 1 threading, and the laterally extending wall 21 forms a support for the vitreous member e4. indicated in Figs. t and t1, the wall 21 provided with an opening 25 extending l rontwardly into the wall, of a size to accommodate the vitreous member 24:, but the opennw 25 does not attend to the front ill) Wall or horn 23 but terminates short there of, as indicated in Fig. 5, with the result that when the vitreous member 24 has been in sertedendwise in the opening 25 and the threading block seated in "the tln'eading block receiving chamber formed in the shut tle, the wood of the shuttle or a shoulder 26 formed thereon overlies the rear end portion of the vitreous member 24L and maintains it in its operative position, as indicated in Fig. 1.

The vitreous member 24 may or preferably will be formed with a glazed and hardened thread engaging surface, asshown, and is mounted in the wall 21 above and over the passageway leading to the side delivery eye, with its lower thread engagingsurface 27 below the thread engaging surface of the vitreous bridge 16, with the result that the thread passing over the bridge 16 will be supported above the lower wall of the thr ad passage and deflected downwardly from the overhanging front portion 1? of the bridge surface to and under the thread engaging provide means for confining the thread in contacting relation with the vitreous member 24 as it passes on its way to the side delivery eye, the wall 21is provided with a stop 28 adjacent the forward portion of the vitreous member 24 and a similar stop 29 adjacent the opposite portion of the vitreous member 2st, the result being that the thread is drawn longitudinally of and above the lower wall of the thread passage over the top of the vitreous bridge 16 and leads from the forwardly projecting or overhanging surface 17 of the bridge, it will pass downwardly under the thread engaging surface of the vitreous member 24 and beconfined in position to engage such surface by the stops 28 and 29 as it passes to the side delivery eye. a

' As indicated in Fig. 1, the thread it passes from the filling carrier 3 into the lOl'lgitlldinally extending thread passage in a man ner similar to the conditions that prevail in the Stimpson patent hereinbefore mentioned, and is guided through the scroll 8 over the upper surface of the vitreous bridge 16 in alineinent with the axis of the scroll or above the lower wall of the thread passage and then downwardly over the frontwardly projecting or overhanging surface 17 of the vitreous bridge, and from here thethrea'd passes downwardly without contacting with the metal parts of the threading block and engages the lower surface of the vitreous member 24 extending over or above the pas-- sageway leading to the side deliveryeye,

while the stops 28 and 29 confine the thread on its way to the side delivery eye into contacting relation with the vitreous member pery nature, the desired tension as it is (18", livered to the side delivery eye 80 of the a shuttle during weaving.

part to the thread, even though it be of slipi From the construction described itwillben apparent that the vitreous bridge 16 formed of glazed porcelain or glass or the like, extends transversely across the longitudinally extending thread passage to supportthe thread above the lower wall thereof, while the vitreous member 24, formed ofsimilar material, extends transversely across the upside delivery eye to deflect the thread downwardly from the bridge, the relation of the two vitreous elements being substantially, though not necessarily, at right angles to each other with their axes in different hori zontal planes.

What is claimed is:

1. An automatically threading shuttle having a side delivery eye, a threading block having a longitudinally extending thread passage communicating with the side delivery eye, a horizontal vitreous bridge at the forward end and extending transversely of the thread passage over whichthe thread passes to the side delivery eye, and a hori zontal vitreous threadengaging member arranged transversely over the passage leadingto the side delivery eye at substantially right angles to the vitreous bridge and under whichithe thread passes on its way from the bridge to the side delivery eye to protect the shuttle parts from wear and provide uniform tension upon the thread as it is withdrawn from the shuttle during weavin 2. An automatically threading loom s uttle having a side delivery eye and a longi- ,9U per portion of the passage leading to the tudinally extending thread passage co1nmunicating with the side delivery eye, a vitreous bridge extending transversely of the longitudinally extending thread passage at the forward end thereof and above the lower wall of the thread passage over which the thread passes. and a substantially horizontal vitreous member above the passage leading to the side delivery eye and under which the thread is deflected as it is withdrawn from the shuttle during weaving.

3. An automatically threading loom shuttle having a side delivery eye, a threading block having a longitudinally extending thread passage, alvitreous bridge at the forward end of the thread passage extending transversely thereof and over which the ihread passes, a vitreous member extending transversely above the passage leading to the side delivery eye, and having its thread engaging under surfaeebelow the top surface of 'the bridge to deflect the thread down- \vardly from the bridge as it is withdrawn from the shuttle during weaving.

43. An automatically threading loom shuttle having aside delivery eye, a threading block having a longitudinally extending thread passage terminating at its forward end in a vitreous bridge the top of which is above the lower wall of the threadpassage and over which the thread passes on its Way to the sidedelivery eye, a vitreous member supported by the threading block overthe passageleadinglto the side'delivery eye and having its under surface below the top sun face of the bridge that the thread may be deflected downwardly from the bridge on its Way to the side delivery eye to tension thethread and prevent wear upon the inetal of the threading block duringweaving.

5. An automatically threading looin shuttle having aside deli-very eye, 'a threading block having a longitudinally extending thread passage, a horizontal vitreous bridge at the forward end of the thread passage having its thread engaging surface above and frontward of the lower wall of the thread passage, a vitreous member arranged ward end of the thread passage having its neeaeee 7. AlLfllltOlIlithlCfl-lly threading loom shuttle having a side'delivery eye, a threading block having a longitudinally extending thread passage, a vitreous bridge at the foraid end of the thread passage extending transversely thereof and over which the thread passes, a vitreous member extending transversely above the path of the thread on its way to'the side delivery eye and haviing its thread engaging surface below the top surface of the bridge to deflect and tension the thread during weaving, and means for supporting the vitreous bridge and vitreous member in theirtransverse relations to the respective thread passages.

8. An automatically threading loom shuttle having a side delivery eye, a threading block having a longitudinally extending thread passage communicating with the passage leadingto the sidedelivery eye, a vitreous bridge having ahard thread engaging surface extending transversely of=the thread passage at the forward end thereof and projecting frontward of the lower wall of the thread passage, a vitreous bridging member extending transversely above the passage way leading to the side delivery eye and having its thread engaging surface below the thread engaging surfaces of the bridge to protect the threading block from wear and deflect and tension the thread as it is withdrawn from the shuttle during weavin Intestini'ony whereof, I have signed my name to this specification.

WALLACE I. STIMPSON. 

